Apex and R1 ECU Similarities? Manual Fuel Tuning Possibility

[MattZx6]

does anyone know how similar the ECU in the Apex is to it's road going brother the R1?

this is an old R1 trick that guys use on their fuelies to adjust for minor mods such as slipons, filters etc...or potentially in our case Ram Air kits and exhaust.

1) Coming out of the ECU is a yellow wire with a red lead. (If it looks like there are two, don't worry. It is the same wire doubled back on itself in the loom.) Ground it.

2) While holding the Select and Reset buttons down at the same time, turn the ignition key to ON. Wait approx. 8 seconds.

3) The Diagnostic window should come on with a "CO" code. Beneath it should be a indicator for Cylinder #1, maybe "Cyl 1," and a number value. That number value represents the factory setting for the air/fuel mix in Cylinder #1. Use the buttons to richen or lean out the cylinder. The dealer recommends richening it 3-5 steps to start, i.e., if it reads 7, richen it to 10-12.

4) Select the next cylinder. Very likely the factory settings are staggered, so if Cylinder #1 was 7, this one may be 10. You don't want to change the stagger. But you do want to richen each cylinder equally. So, if you added 3 to Cylinder #1, add three to Cylnder #2. This gives you a new Cylinder #2 setting of 13.

5) Repeat for each cylinder.

6) Turn ignition OFF.

7) Remove ground.

 

[ROCKERDAN]

MATT!!!!!!!...what you got up your sleave bud??...are we thinking richer means more HP??????...might work well with ram-air eh??...nice,now whos gonna confirm if this works?...or shall we test on your this weekend??

LOL

Dan

 

[MattZx6]

my years of being involved in the sportbike world could prove to be useful for more than getting speeding tickets if this actually works...who knows though, for all I know it could be completely different. I havent taken a look at an Apex ECU.

I'll bring a case of beer and bottle of CC up this weekend and we'll try it on yours

 

[MyOutdoors]

That would be coooool!

 

[mclarenyamaha]

this adjustment will only work from no trottle to 1/3 trottle. is has the same range as the pilotjets. i have gone from 0 to -10 on my attak,just to give it less fuel on that range. and to se better fuel usage in that erea.

 

[Waterboy]

Yes. The wire I ground is a green wire in a Harness. Will not go any further in description, but you are close. This is an area that not many should go.

 

[170plus]

hey mattzx6....we actually did mine by hooking a exhaust gas sensor to each tube on the headers and read each cylinder independantly,we set mine so the air/fuel ratio was around 13.4-13.5,from the factory it was actually down around 12.4,went from 0.0.1.0 from factory to 5.5.6.5,the way you explained it was right but how do you know how rich to go or if the cylinders are all running the same air /fuel mixture without actually checking each one with the exhaust gas sensor?does this effect only certain rpm range or is this throughout entire rpm range from idle to top,let me know casue if i can gain more i want to know ,thanks for the info

 

[MattZx6]

I've never actually actually gone through this process myself. There was a point in time a couple years ago that I considered switching from 'Zuk in favor of a 04 R1 so I spent some time over on the R1 forums. Just the other day out of the blue I remember reading about this years back and went back to the forum to find the post.

Just thought i'd throw the info out there more as food for thought than anything..

 

[welterracer]

So was anyone able to extract more power doing this or any better gas milage??